Question
Modern cement and Ancient cement
| Modem cement | Ancient cement |
| 1. Cement manufactured from 60% lime, silica 25% and alumina 5%. the rest is iron oxide and gypsum. | 1. Romans used to make aqueous cement by mixing volcanic ash in moistened lime. It was very durable. |
| 2. It is the most commonly used cement for Construction work. | 2. It is Roman cement volcanic ash prevent cracks from spreading. |
| 3. It is called Portland Cement. | 3. It is called Aqueous Cement. |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.